Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

7 Cards in this Set

  • Front
  • Back
A lesion of the optic nerve between the retina and the optic chiasm
loss of vision in the ipsilateral eye only
A lesion through the center of the optic chiasm
- destroys crossing fibers from nasal retinae that get
info from the temporal VF's
- you get bitemporal hemianopsia, 1/2 the VF
- gets the left VF in one eye and the right VF in the other, aka heteronymous hemianopsia
- from pituitary tumors
A lesion of the tract after the chiasm
- loss of the contralateral VF
- homonymous hemianopsia since the VF is on the same side in each eye
- it severs fibers from the contr nasal retina (which receives info from the contra temporal visual field) and from the ipsi temporal retina (which receives info from the contr nasal visual field).
what produces Homonymous hemianopsia
complete lesion of the LG, optic
radiations, or visual cortex
a lesion of the temporal lobe can destroy these sweeping fibers (Meyer's loop or optic radiations)
- upper homonymous quadrantanopsia
- Fibers following a more direct course from LG to VC get the contra lower quadrant of the VF and are less likely to be selectively destroyed
Damage to the cuneus
- contalateral lower quadrantanopsia
Damage to the lingula
- contralateral upper quadrantanopsia (similar to
damage to Meyer’s loop).